Which of the following scenarios most clearly exemplifies the successful use of a manager's diagnostic skills in dealing witl

a$.$ Sally must convince Gary and Roberta to work overtime. Since Gary's top priority is his own self$-$interest, she emphasizes how n Roberta's top priority is her well$-$being, she emphasizes how much it will mean to her to work overtime.

b$.$ Sally suspects that Gary is underperforming because he is not getting enough sleep, not because he is incapable. She lets him $v$ performance improves.

c$.$ Sally has to decide whether to disband Gary and Roberta's division and form a new division to develop an innovative new produ

d$.$ A program on Sally's computer stops working. She could ask Gary, a member of the tech support team, to fix it$,$ but Sally is good less time than it would have taken Gary to come over and fix it$.$